.tiling-game { display: grid; grid-template-columns: minmax(0, 1fr) 304px; gap: 28px 42px; }
.tiling-settings { grid-column: 1 / -1; display: grid; grid-template-columns: 180px minmax(160px, 1fr); gap: 20px; align-items: center; width: min(100%, 540px); }
.tiling-challenge-heading { display: flex; align-items: center; justify-content: space-between; font-size: 13px; }
.tiling-challenge-heading output { font: 12px var(--mono); color: var(--green); }
.tiling-settings input { width: 100%; min-height: 44px; margin: 0; accent-color: var(--green); cursor: pointer; }
.tiling-play { min-width: 0; }
.tiling-info { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 5px 14px; margin-bottom: 12px; font: 12px/1.7 var(--mono); color: var(--muted); }
.tiling-info [data-tiling-name] { color: var(--green); }
.tiling-board { --tiling-columns: 4; --tiling-rows: 4; display: grid; grid-template-columns: repeat(var(--tiling-columns), 1fr); grid-template-rows: repeat(var(--tiling-rows), 1fr); width: min(100%, 442px); aspect-ratio: var(--tiling-columns) / var(--tiling-rows); gap: 0; padding: 10px; margin: 0 auto; border: 1px solid var(--line); border-radius: 8px; background: #eeeFE8; }
.tiling-board > img { display: block; width: 100%; height: auto; grid-column: 1 / -1; grid-row: 1 / -1; }
.tiling-cell { position: relative; min-width: 0; padding: 0; border: 1px solid #d8ddd1; border-radius: 0; background: var(--paper); color: #222e2a; font: 16px var(--mono) !important; }
.tiling-cell.is-filled { --tile-edge: color-mix(in srgb, var(--tile-color) 60%, #35473c); background: var(--tile-color); border-color: var(--tile-color); }
.tiling-cell.edge-top { border-top: 2px solid var(--tile-edge); }
.tiling-cell.edge-right { border-right: 2px solid var(--tile-edge); }
.tiling-cell.edge-bottom { border-bottom: 2px solid var(--tile-edge); }
.tiling-cell.edge-left { border-left: 2px solid var(--tile-edge); }
.tiling-cell.is-filled > span { position: relative; z-index: 1; }
.tiling-cell.is-selected { --tile-edge: var(--green); background: color-mix(in srgb, var(--tile-color) 82%, white); border-color: color-mix(in srgb, var(--tile-color) 82%, white); }
.tiling-cell.is-selected.edge-top { border-top-color: var(--green); }
.tiling-cell.is-selected.edge-right { border-right-color: var(--green); }
.tiling-cell.is-selected.edge-bottom { border-bottom-color: var(--green); }
.tiling-cell.is-selected.edge-left { border-left-color: var(--green); }
.tiling-cell.is-drag-origin { opacity: .25; }
.tiling-cell.tiling-hole { border: 1px dashed #c6ccbf; background: repeating-linear-gradient(135deg, transparent, transparent 5px, #d9ded3 5px, #d9ded3 6px); }
.tiling-cell:not(.tiling-hole):not(.is-filled):hover { border-color: var(--green); }
.tiling-cell:focus-visible { z-index: 2; outline-offset: 1px; }
.tiling-cell.is-preview::after, .tiling-cell.is-preview-invalid::after { content: ''; position: absolute; inset: 2px; border: 2px solid var(--green); border-radius: 2px; background: color-mix(in srgb, var(--preview-color) 45%, transparent); pointer-events: none; }
.tiling-cell.is-preview-invalid::after { border: 2px dashed #aa4940; background: repeating-linear-gradient(135deg, #c97c6c50, #c97c6c50 4px, #fcfcf960 4px, #fcfcf960 7px); }
.tiling-cell.is-preview-anchor::before { content: ''; position: absolute; left: 50%; top: 50%; width: 7px; height: 7px; transform: translate(-50%, -50%); background: var(--green); border-radius: 50%; border: 1px solid var(--paper); z-index: 3; pointer-events: none; }
.tiling-anchor-dot { position: absolute; bottom: 7px; right: 7px; width: 5px; height: 5px; border-radius: 50%; background: #282e29; box-shadow: 0 0 0 1px #fcfcf9; }
.tiling-pieces { min-width: 0; }
.tiling-tray-heading { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 16px; }
.tiling-tray-heading h2 { margin: 0; font: 25px/1.2 var(--serif); letter-spacing: -.5px; }
.tiling-tray-heading > span { color: var(--muted); font: 12px var(--mono); }
.tiling-tray { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.tiling-piece { display: flex; flex-direction: column; align-items: center; gap: 10px; min-height: 144px; padding: 12px; border: 1px solid var(--line); border-radius: 7px; background: var(--paper); touch-action: none; }
.tiling-piece:hover { border-color: #aebfaa; background: #f4f7ef; }
.tiling-piece.is-selected { border-color: var(--green); box-shadow: inset 0 0 0 1px var(--green); background: #eef2e9; }
.tiling-piece.is-placed { background: #f4f5ef; }
.tiling-piece.is-placed svg { opacity: .65; }
.tiling-piece.is-selected svg { opacity: 1; }
.tiling-piece-name { display: flex; align-items: center; justify-content: space-between; width: 100%; text-align: left; font: 13px var(--sans); color: var(--green); }
.tiling-quantity { padding: 2px 7px; border-radius: 4px; background: var(--tint); font: 12px var(--mono); }
.tiling-piece svg { display: block; height: 60px; max-width: 100%; margin: auto; overflow: visible; }
.tiling-piece-state { font-size: 12px; color: var(--muted); }
.tiling-status { margin: 0 0 12px; color: var(--green); font-size: 14px; line-height: 1.7; }
.tiling-actions { margin-bottom: 16px; }
.tiling-game.is-solved .tiling-board { border-color: #9ab28d; background: #e4edde; }
.tiling-cell.is-filled { touch-action: none; }
.tiling-game.is-dragging { cursor: grabbing; user-select: none; }
.tiling-drag-ghost { position: fixed; pointer-events: none; z-index: 100; opacity: .85; filter: drop-shadow(0 4px 8px #282e2940); }
.tiling-drag-ghost svg { display: block; width: 100%; height: auto; }
@media (max-width: 760px) {
  .tiling-game { grid-template-columns: minmax(0, 1fr) 250px; gap: 24px; }
  .tiling-tray { gap: 6px; }
  .tiling-piece { min-height: 136px; padding: 10px; }
  .tiling-board { padding: 7px; }
}
@media (max-width: 620px) {
  .tiling-game { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 12px; }
  .tiling-settings { grid-column: 1 / -1; grid-row: 1; grid-template-columns: 1fr; gap: 0; margin-bottom: 8px; }
  .tiling-play { grid-column: 1 / -1; grid-row: 4; margin-top: 6px; }
  .tiling-pieces { display: contents; }
  .tiling-tray-heading { grid-column: 1 / -1; grid-row: 2; margin: 0; }
  .tiling-board { max-width: 400px; }
  .tiling-tray { grid-column: 1 / -1; grid-row: 3; display: flex; gap: 8px; overflow-x: auto; overscroll-behavior-x: contain; scroll-snap-type: x proximity; padding: 5px 3px 10px; position: sticky; top: 0; z-index: 5; background: var(--paper); }
  .tiling-piece { flex: 0 0 112px; min-height: 128px; padding: 9px; gap: 6px; scroll-snap-align: start; touch-action: pan-x; }
  .tiling-piece svg { height: 48px; }
  .tiling-piece-name, .tiling-piece-state { font-size: 12px; }
  .tiling-quantity { padding: 2px 5px; }
  .tiling-pieces > noscript { grid-column: 1 / -1; }
  .tiling-cell { font-size: 14px !important; }
}